LSD microdosing experiment: pair 19: placebo then active?

Created by gwern on 2013-03-04; known on 2013-03-05; judged right by gwern on 2013-03-04.

• gwern estimated 60% on 2013-03-04
• gwern on 2013-03-04
• gwern   judged this prediction right on 2013-03-04.

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